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Volume 23 (1967)
- Issue 6 Pages 267-
- Issue 5 Pages 221-
- Issue 4 Pages 175-
- Issue 3 Pages 115-
- Issue 2 Pages 57-
- Issue 1 Pages 1-
Volume 23, Issue 5
Displaying 1-5 of 5 articles from this issue
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Yutaka NAGATA1967 Volume 23 Issue 5 Pages 221-230
Published: October 31, 1967
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSThe structure of shallow temperature inversions are studied by using the data from several series of BT observations made at the comparatively small intervals.
Temperature inversion layers usually occur in the sea where the temperature structure is complicated and the isotherms are rugged. Strong inversions can be found near the place where the isotherms are raised and the upward convective motion seems to be existing. Inversion layers are seldom found south of the Kuroshio front.
The horizontal scale of the “small scale” temperature inversion layer is of order of 10 nautical miles. In order to know the structure of the inversion layer, we must select the spatial interval of the observation shorter than 3 nautical miles even in the case of relatively large inversion layer. The shape of the inversion layer seems to change considerably whithin a day. So, it is desirable to select the temporal interval of the observation to be of order of an hour.View full abstractDownload PDF (2502K) -
A Prediction of Eastward Flows at Lower Subtropical LatitudesKozo YOSHIDA, Toshiko KIDOKORO1967 Volume 23 Issue 5 Pages 231-246
Published: October 31, 1967
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSA calculation from distributions of surface wind stresses indicates a curious band of relatively narrow eastward transport on lower subtropical latitudes for certain seasons centered during winter and spring. The occurrence of the predicted eastward flow is widespread over the world oceans. A number of evidences based on various recent observations appear to suggest the real existence of such features. An analysis of wind stress data of various sources reveals that a trough in the anticyclonic wind-stress vorticity is found near the boundary between the Trades and the westerlies and is essentially responsible to the eastward transport. Thus, the anticyclonic subtropical gyre appears to be split into two gyres, though weakly, separated by somewhat variable zone of cyclonic vorticity.View full abstractDownload PDF (6101K) -
Tatsuichi IWAMURA, Tamotsu KANAZAWA, Kazuo SHIBATA, Yuji MORIMURA, Shu ...1967 Volume 23 Issue 5 Pages 247-251
Published: October 31, 1967
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESS(1) Using a pure culture of a marine diatom, Phaeodactylum tricornutum, as an example of phytoplankton, the contents of chlorophyll, RNA, DNA and protein in algal cells were measured, respectively, by the methods of ARNON, OGUR and ROSEN, BURTON and LOWRY et al.. The results of analyses were compared with those obtained earlier with synchronous cultures of a green alga Chlorella ellipsoidea.
(2) The plankton harvested from water of an eutrophic Lake Nakanuma (in Ibaraki Prefecture) was subjected to the same methods of analysis. It was found that in the plankton. the RNA/protein ratio was roughly of the same order of magnitude as that for P. tricornutum. In contrast, the DNA/protein ratio was very high and the chlorophyll/protein, chlorophyll/RNA and RNA/DNA ratios were markedly lower as compared with those obtained for the pure culture of the marine diatom.
(3) Attempt was made at simplifying the procedures of analysis by subjecting the cells of the marine diatom collected, in different quantities, on the Millipore filters to direct spectrophotometric analysis of chlorophyll followed by the RNA analysis using a modified Ogur-Rosen method. An approximately linear relationship was obtained between the quantities of cells and RNA, whereas the corresponding plot made for chlorophyll vs cell quantity was found to consist of two straight lines.
(4) Discussions were made on the significance and suitability of measuring the quantities of chlorophyll, RNA, DNA and protein for the assessment of the quantity of plankton in natural waters.View full abstractDownload PDF (843K) -
William E. GILBERT, Walter M. PAWLEY, Kilho PARK1967 Volume 23 Issue 5 Pages 252-255
Published: October 31, 1967
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSDownload PDF (488K) -
Tosio NAN'NITI, Kimie ITO1967 Volume 23 Issue 5 Pages 256-257
Published: October 31, 1967
Released on J-STAGE: June 17, 2011
JOURNAL FREE ACCESSA new deep-sea current meter is presented which will record both the current speed and direction on the recording paper. The recording will hIst continuously for about 3.5 days, the maximum recommended depth for use is 1, 000m.View full abstractDownload PDF (3541K)
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